Low pressure casting can be used. Piston casting is relatively simple, but if it is to achieve high quality, it needs more controlled processes to achieve 1. Pre-furnace test: After the alloy is evenly melted, take samples and test to check whether various chemical components meet the technical standards. 3. Refining-After the chemical composition is compounded, a refining agent should be used to remove the dissolved gas and entrained solid particles in the alloy. Generally, suitable aluminum profiles are melted, then added to a suitable mold and cooled to obtain aluminum castings. Raw material preparation-including raw material appearance inspection, chemical composition analysis, ingredients and weighing various raw materials based on the results of ingredients calculation. Casting: Cast the aluminum alloy with qualified chemical composition, good modification effect, gas content and slag content to meet the requirements into ingots and bundle them.. In addition, it also includes drying and weighing refining agents and modifiers. Let me talk about the specific eight-step process. Composition adjustment-after testing, if one or several chemical compositions in the alloy are found to exceed the technical standard, adjustments should be made to make the chemical composition meet the technical standard.Melting\u2014\u2014Put the raw materials into the furnace according to a certain feeding Aluminum alloy machining products sequence, and melt them into an alloy with uniform chemical composition. Refinement and modification-add appropriate amount of refiner and modifier to the aluminum alloy liquid to improve the mechanical properties and workability of the alloy.Therefore, the method of aluminum casting is relatively simple. Inspection and storage-after inspection, aluminum alloy ingots with qualified chemical composition, gas content, inclusions, deterioration effect, mechanical properties, and appearance will be stored as qualified products.Aluminum casting is a casting method used to process various aluminum castings The adhesion between the coating and the base metal is reduced. The transition layer of the copper casting can also play a role of isolation, which can prevent the diffusion between the coating and the substrate.